Charlie Sheen has been in far worse troubles than Asthon Kutcher while on this particular show!

http://www.foxnews.com/entertainment/2011/10/19/are-ashton-kutchers-ta bloid-troubles-behind-decline-in-two-and-half-men-ratings/

The revamped CBS sitcom has declined in viewers every week amid reporters of Kutcher cheating on Demi Moore.

I think the lack of humor is the culprit.

Nah, it's still getting ratings any show would kill for right now.